RHIZOPODA. CAMBRIAN AND SILURIAN. 
PALZOZOIC. 
UPPER SILURIAN. 
=F 
CAMBRIAN. LOWER SIL. 
Se = 
————— 
E élelslelelsl-ls| ./& 
| |e alS[S|4/S/ZlE|Slels 
el se ALS elas iaisiaisis 
AlglBle] | slS/E[Slol@iae| els is 
SPECIES. s|2 ais) (elelslslSisisiAleilela REFERENCES. 
BIG eielclie silelacleeierile 
AR EE EGE Saeeele 
BISIRIISIAIS ISIE E FE HI<iS ia |e 
Kingdom, ANIMALIA. 
Sub-Kingdom, PROTOZOA. 
Class, RHIZOPODA. 
Order, Spongida. 
STROMATOPORIDE. 
Clathrodictyon ... Nicholson & 
Murie, 1878 
— vesiculosum,,,... N. & Mar. efee fe seclave[cetlece|eee|eoef ene ves[ & [oe |eee[eee[eeefeee|eee] Jour. Linn. Soc. vol. xiv, p. 220, t. 2; f. 11-13; ib. Nich. 
& Ether. Mono, Sil. Foss, Girvan, p. 238, t. 19, £. 2. 
HEXACTINELLIDE, 
Dictyophyton...... Hall, 1863...... 
— Danbyi............ DS BOLL ieee LO sor ead 6 lade food lace [esl seal | Geol bios veli.[ a lee|--| Detragonis, Brit. Pal. Foss. p. 62, t. 1 D, f. 7, 8. Dictyo- 
phyton, Hinde, Cat. Foss. Sponges, Brit. Mus. Nat. Hist. 
p. 131. 
Girvanella ......... SNA CHOLBOR Ge) | \Ileea|keal ceellnw sl oot llselars|\oo" wel sesleeefece{ere]aee{eee]oeefeee] Mono. Sil. Foss. Girvan District, p. 23. 
Etheridge, 1878 
— problematica ... Nich. & Hther.|...|...)...|..feee|ece| & [eeefeee sesfecelaeeleee|oeefeee[eee|ee| Mono. Sil. Foss. Girvan District, p. 23, t. 9, f. 24. 
SPONGIDA. 
Hyalonema......... Gray, 1835  ...|...Jore|ooefecefers aa lisiara lear plo <st|[es||«2t|(ere||eer|eal|lersi|(eae|| LOC ZOOL. SOC. VOl. ait, p.l03s 
— Girvanense ...... Nich. & Ether.|...|... eaa|easpsss sels Icor eae seclove[eee[ere]oee{eoe]eee{-e-| Mono. Sil. Foss. Girvan, p. 239, t. 19, £. 1. 
POLLAKIDE. . 
Hyalostelia......... Zittel, 1878 ... 
Pyritonema ,,, M‘Coy, 1850... 
— fasciculus ...... IWR) conceccon 54 bcol lool Gel (53 see lsesisae fee Bel (ol fas wse|.e-[eee{eee]-ee]| Pyritonema, Brit. Pal. Foss. p. 10, t. 1 B, f.13. Hyalo- 
stelia, Hinde, Cat. Foss. Sponges, Brit. Mus. Nat, Hist. 
p. 151. 
SPONGIDA. 
Ischadites ...,.. Murchison, 1839 
— Grindrodi ...... ISLE ceoreserress esl eee desl eee Hes sel eaal ood |-oclfeoalloeollooe|lenellces| bocllcool ocel| T2906 osbres Finer oie 
— Kenigii ......... Miaurehs vis.c.0.. eel [earl tevrll ee vac leaf see xlal«|*|«|«*|---|-.-] Sil. Syst. p. 697, t. 26, f. 11, Vide G.I. Hinde, Q. J. Geol. 
Soe. vol. xl, p. 836. 
— Lindstremi..,,.., FLUNG cevsserse Meal Seal ealen | Ses cod lease ae vas| x [oee[ ae [eee {eee{-ee[-e-] Q. J. Geol. Soc. vol. xl, p. 839, t. 36, f. 2; cf. Ischadites 
Grindrodi ? Salt. MS. 
— tessellatus ...... Salt. MS. ...... 41 eee local aed Joos Fre See) eel Vas # [eee[eosfeee{-es[eee{eee].-.| Siluria, 4 ed, 1867, p. 509. Vide Hinde, loc. cit. p. 839. 
STA URODERMID, 
Plectoderma ...... Hinde, 1883 ... 
— scitulum ......... JET OOS © Pepeeorn 55) fdoe| foo) food (aoc B2b|Ioad) [bor feed [ees [ac .| *|...|..| Cat. Foss. Sponges, Brit. Mus. Nat. Hist. p. 132, t. 31, f.1. 
SPONGIDA. 
Protospongia .../,. Salter, 1864 ... 
— fenestrata ...... Salter ..ccss0s- |e | ok ]-eefee seclecul|beabese vecfess{ece[eofeeefeefee{eee] Wide Sollas, Q. J. Geol. Soc. vol. xxxvi, p. 363; woodcut, 
f.1, p. 365, f.2; ib. Hinde, Cat. Foss. Sponges, Brit. Mus. 
p. 129, t. 28, £. 2. 
Pyritonema......... M‘ Coy, 1850... 
— antiqua ......... R. Ether. ...... vodleccleccliselfees|ecdlece|ees[ree|eeulees|ees|seelsasleen|eeu|een|) keeterence:doubtfal: 
— fasciculus ,,.... MEO CY merase Pr en Pee Be) (Aa ee sal bat bac ses[eee]ove[ooe|eosfece|cee]...| 70@e Hyalostelia. 
390 
